I don't think I knew you could still get a 2-door hardtop Impala for 1975. https://dayton.craigslist.org/cto/6008178620.html
I think you could get the HT body style all the way thru the 1976 Model year. And I think the only thing working against this car is the color's. And the bad dash board but other than that it is a nice example and the asking price is not out of line.
I would much rather have this Sport coupe over the Custom coupe. But that's just me. I don't mind the color on this one, but you are probly right cammerjeff, it's likely a factor for a lot of potential buyers.
'75 was the last year you could get a true 2-door hardtop in the full-sized Chevy line. In '76, they changed the roof to this: Somewhat surprisingly, you could still get a true 4-door hardtop in 1976 though!
https://charlotte.craigslist.org/cto/d/75-impala/6442495059.html Here's another in a much more pleasing color combo.